libcxx/test/std/containers/views/views.span/span.objectrep/as_writable_bytes.verify.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 // UNSUPPORTED: c++03, c++11, c++14, c++17
   9
  10 // <span>
  11
  12 // template <class ElementType, size_t Extent>
  13 //     span<byte,
  14 //          Extent == dynamic_extent
  15 //              ? dynamic_extent
  16 //              : sizeof(ElementType) * Extent>
  17 //     as_writable_bytes(span<ElementType, Extent> s) noexcept;
  18
  19 #include <span>
  20 #include <string>
  21
  22 #include "test_macros.h"
  23
  24 const int iArr2[] = { 0,  1,  2,  3,  4,  5,  6,  7,  8,  9};
  25
  26 struct A {};
  27
  28 void f() {
  29   std::as_writable_bytes(std::span<const int>());            // expected-error {{no matching function for call to 'as_writable_bytes'}}
  30   std::as_writable_bytes(std::span<const long>());           // expected-error {{no matching function for call to 'as_writable_bytes'}}
  31   std::as_writable_bytes(std::span<const double>());         // expected-error {{no matching function for call to 'as_writable_bytes'}}
  32   std::as_writable_bytes(std::span<const A>());              // expected-error {{no matching function for call to 'as_writable_bytes'}}
  33   std::as_writable_bytes(std::span<const std::string>());    // expected-error {{no matching function for call to 'as_writable_bytes'}}
  34
  35   std::as_writable_bytes(std::span<const int, 0>());         // expected-error {{no matching function for call to 'as_writable_bytes'}}
  36   std::as_writable_bytes(std::span<const long, 0>());        // expected-error {{no matching function for call to 'as_writable_bytes'}}
  37   std::as_writable_bytes(std::span<const double, 0>());      // expected-error {{no matching function for call to 'as_writable_bytes'}}
  38   std::as_writable_bytes(std::span<const A, 0>());           // expected-error {{no matching function for call to 'as_writable_bytes'}}
  39   std::as_writable_bytes(std::span<const std::string, (std::size_t)0>()); // expected-error {{no matching function for call to 'as_writable_bytes'}}
  40
  41   std::as_writable_bytes(std::span<const int>   (iArr2, 1));     // expected-error {{no matching function for call to 'as_writable_bytes'}}
  42   std::as_writable_bytes(std::span<const int, 1>(iArr2 + 5, 1)); // expected-error {{no matching function for call to 'as_writable_bytes'}}
  43 }